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“Large data” work flows using pandas
...ation itself: "If you are looking to manage a terabyte or less of tabular CSV or JSON data, then you should forget both Spark and Dask and use Postgres or MongoDB."
– Michele Piccolini
Jul 30 at 15:51
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Getting individual colors from a color map in matplotlib
...he solutions from Ffisegydd and amaliammr, here's an example where we make CSV representation for a custom colormap:
#! /usr/bin/env python3
import matplotlib
import numpy as np
vmin = 0.1
vmax = 1000
norm = matplotlib.colors.Normalize(np.log10(vmin), np.log10(vmax))
lognum = norm(np.log10([.5, ...
Python: fastest way to create a list of n lists
...et with say 50 rows and 20 columns. ie. Train[0] gives me the 1st row of a csv file, train[1] gives me the 2nd row and so on. I am interested in separating the dataset with 50 rows as one list, except the column 0 , which is my explained variable here, so must be removed from the orignal train datas...
Creating a simple XML file using python
...er file, however, also has the position number in the corresponding input (csv) file where the data will be taken from.
This way, if there's any changes to the position of the data coming in from the input file, the program doesn't change; it dynamically works out the data field position from the ap...
python requests file upload
... {'upload_file': open('file.txt','rb')}
values = {'DB': 'photcat', 'OUT': 'csv', 'SHORT': 'short'}
r = requests.post(url, files=files, data=values)
and requests will send a multi-part form POST body with the upload_file field set to the contents of the file.txt file.
The filename will be include...
What is the best way to implement nested dictionaries?
...
@jason Depending on the data, I like to use JSON, csv files, or even a sqlite database to store it.
– nosklo
Feb 12 '19 at 6:37
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SQL Server insert if not exists best practice
...ck and easy as possible to truncate and reload it from an Excel sheet or a CSV file, or whatever form you have that data in.
That interface table should not be considered part of the normalized set of operational tables. Then you can join with CompetitionResults as suggested by Richard, to insert ...
如何建立一套适合自己的高胜算交易系统 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...大单分析(这在你的交易系统说明中有充分的体表)；股东数据分析；换手率分析；指数对大盘重心的偏离度分析。寻找买点和卖点。
4)指数偏离大盘重心的程度与仓位线性关系探索，创立指数和仓位的年度方程和季度方程。
5)...
上海选出最强\"加班楼\" 恒隆广场居首位 - 创意 - 清泛网 - 专注C/C++及内核技术
...前三名。发起这一活动的滴滴专车平台昨天表示，后台大数据分析显示，相关地区有很多用户在深更半夜叫车回家，基本都是加班族。
这一覆盖北上广深的“加班楼”票选活动，这几天在网上相当流行。该活动由滴滴专车平台...
硬盘最神秘的功能，万万想不到 - 轻松一刻 - 清泛网 - 专注C/C++及内核技术
...干净~
这块漆黑的磁盘，存储着一些不可告人的重要数据。
6根自行车辐条。
找来一个很高级的铁盒盒。
这种办法可以很轻松的确定其重心~
用圆规划一个圈，定位打孔~
然后在盒盒侧边给它扎上几针。
居...